re galaxy

Hi i,ve got 1996 p 2.0 petrol galaxy which had a head gasket fail i had a guy come out and attempt to repair the car he put it all back together and couldnt get it going he never came back and didnt get paid i was to busy to do the job myself and now wish i had, anyway can anybody tell me how to replace the crankshaft gasket i,ve got the new one the guy just used the old one and a tube of silicon, and lastly can anybody tell me or show me the wiring diagram for the injectors i think a plug is on the wrong injector as it starts but pushes fuel through the airbox and runs a tad rough many thanks Dan